Chronic exposure to emissions from photocopiers in copy shops causes oxidative stress and systematic inflammation among photocopier operators in India

Table 5 Socio economic status and lifestyle of the study subjects

Demographics	Control	Photocopier workers	p value
N	43	81
Male (%)	30 (70)	64 (79)	0.253*
Age Mean (S.D)	31.7 (7.4)	32.6 (7.1)	0.467**
Monthly income(Rs)
≤3000	1 (2)	2 (3)	0.047†
3001–10000	27 (63)	61 (75)
10000–20000	5 (12)	13 (16)
>20000	10 (23)	5 (6)
BMI Mean (S.D)	24.2 (4.0)	24.9 (6.2)	0.513**
Current smokers (%)	8 (19)	30 (37)	0.041*
Pack years Mean (S.D)	2.0 (1.8)	2.9 (4.6)	0.510**
Cumulative exposure (1000 s of hours)
10 – 20		13
21 – 30		30
31–40		13
41 – 70		15
Alcohol use	11 (26)	30 (37)	0.232

* - Chi square test; ** - Students t test; † − Fisher’s exact test.
BMI Body mass index; Pack years = (Average number of cigarettes per day/20) × number of years smoked.
Cumulative exposure = No. of working hours/day × No. of working days/week × No. of years of exposure × 50 weeks/year.

ISSN: 1476-069X